Method _checkUpdate

bin/yarn-standalone.js:7421–7457

()

  }

  _checkUpdate() {
    var _this13 = this;

    return (0, (_asyncToGenerator2 || _load_asyncToGenerator()).default)(function* () {
      let latestVersion = yield _this13.config.requestManager.request({
        url: (_constants || _load_constants()).SELF_UPDATE_VERSION_URL
      });
      invariant(typeof latestVersion === 'string', 'expected string');
      latestVersion = latestVersion.trim();
      if (!semver.valid(latestVersion)) {
        return;
      }

      // ensure we only check for updates periodically
      _this13.config.registries.yarn.saveHomeConfig({
        lastUpdateCheck: Date.now()
      });

      if (semver.gt(latestVersion, (_yarnVersion || _load_yarnVersion()).version)) {
        const installationMethod = yield (0, (_yarnVersion || _load_yarnVersion()).getInstallationMethod)();
        _this13.maybeOutputUpdate = function () {
          _this13.reporter.warn(_this13.reporter.lang('yarnOutdated', latestVersion, (_yarnVersion || _load_yarnVersion()).version));

          const command = getUpdateCommand(installationMethod);
          if (command) {
            _this13.reporter.info(_this13.reporter.lang('yarnOutdatedCommand'));
            _this13.reporter.command(command);
          } else {
            const installer = getUpdateInstaller(installationMethod);
            if (installer) {
              _this13.reporter.info(_this13.reporter.lang('yarnOutdatedInstaller', installer));
            }
          }
        };
      }
    })();
  }

  /**
   * Method to override with a possible upgrade message.